RMG ERZ2000-NG, Operating Manual

Page: 150 / 454

3 Electrical connections
Manual ERZ 2000-NG · EN07 · 2019, May 13th
140
3.1.20 MR Frequency output 1
Figure 101: Menu MR Frequency output 1
This frequency output is a help function in case the flow computer is also the main
totalizer for a connected ultrasonic meter. A frequency signal is required from the ul-
trasonic gas meter for pre-testing / calibration / test stand testing. This signal is pro-
vided for comparison with a reference device. A currently more common alternative is
use of the MODBUS for transmission of the current values.
The MR05 Assignment of the frequency output to one of the pre-adjusted and se-
lectable measurement variables (different flow rates and flows) takes place here. If
the pre-adjusted selection is not sufficient, any other arbitrary variable can be as-
signed in a selection menu that opens when the user clicks on
edit in coordinate
MR06 Extended assignm. .
The following MR10 Operating mode s are available:
"off", "0-1000Hz", "0-2000Hz", "0-2500Hz", "Default" and "Test frequency"
If "Default" is selected, the setpoint of the setpoint of the frequency should be entered
in
MR13 Default frequency . For the "Test frequency" operating mode, the setpoint
of the frequency should be specified in MR14 Test frequency . The actual value of
the frequency output is displayed in MR19 Act. frequency .
A deviation from ACTUAL to setpoint frequency if possible if the setpoint cannot be
represented by the internal binary divisor without remainder. The deviation is shown
in
MR20 Absolute error .